6.2.1 General requirements NOTE: For aerosol dispensers and small receptacles containing gas (gas cartridges) see

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1 Chapter 6.2 Requirements for the construction and testing of pressure receptacles, aerosol dispensers and small receptacles containing gas (gas cartridges) General requirements NOTE: For aerosol dispensers and small receptacles containing gas (gas cartridges) see Design and construction Pressure receptacles and their closures shall be designed, calculated, manufactured, tested and equipped in such a way as to withstand all conditions, including fatigue, to which they will be subjected during their normal use and during normal conditions of carriage. In the design of pressure receptacles, all relevant factors shall be taken into account such as: internal pressure; ambient and operational temperatures, including during carriage; dynamic loads. Normally the wall thickness shall be determined by calculation, accompanied, if needed, by experimental stress analysis. The wall thickness may be determined by experimental means. Appropriate design calculations for the pressure envelope and supporting components shall be used to ensure the safety of the pressure receptacles concerned. The minimum wall thickness to withstand pressure shall be calculated in particular with regard to: the calculation pressures, which shall not be less than the test pressure; the calculation temperatures allowing for appropriate safety margins; the maximum stresses and peak stress concentrations where necessary; factors inherent to the properties of the material. For welded pressure receptacles, only metals of weldable quality whose adequate impact strength at an ambient temperature of 20 C can be guaranteed shall be used. The test pressure of pressure receptacles is prescribed in packing instruction P200 in for cylinders, tubes, pressure drums and bundles of cylinders. The test pressure for cryogenic receptacles, closed, shall not be less than 1.3 times the maximum working pressure increased by 1 bar for vacuum insulated pressure receptacles. Material characteristics to be considered are, when applicable: yield stress; tensile strength; time-dependent strength; fatigue data; Young's modulus (modulus of elasticity); appropriate amount of plastic strain; impact strength; fracture resistance Pressure receptacles for UN No.1001, acetylene, dissolved, shall be filled entirely with a porous material, uniformly distributed, of a type approved by the competent authority and which: (a) does not attack the pressure receptacles or form harmful or dangerous compounds either with the acetylene or with the solvent; (b) is capable of preventing the spread of decomposition of the acetylene in the porous material. The solvent shall not attack the pressure receptacles. The above requirements, excluding those for the solvent, apply equally to pressure receptacles for UN No acetylene, solvent free

2 Pressure receptacles assembled in bundles shall be structurally supported and held together as a unit. Pressure receptacles shall be secured in a manner that prevents movement in relation to the structural assembly and movement that would result in the concentration of harmful local stresses. Manifolds shall be designed such that they are protected from impact. For toxic liquefied gases with a classification code of 2T, 2TF, 2TC, 2TO, 2TFC or 2TOC, means shall be provided to ensure that each pressure receptacle can be separately filled and that no interchange of pressure receptacle contents can occur during carriage Contact between dissimilar metals which could result in damage by galvanic action shall be avoided The following requirements apply to the construction of closed cryogenic receptacles for refrigerated liquefied gases: The mechanical properties of the metal used shall be established for each pressure receptacle, including the impact strength and the bending coefficient; with regard to the impact strength see The pressure receptacles shall be thermally insulated. The thermal insulation shall be protected against impact by means of a jacket. If the space between the pressure receptacle and the jacket is evacuated of air (vacuum-insulation), the jacket shall be designed to withstand without permanent deformation an external pressure of at least 100 kpa (1 bar) calculated in accordance with a recognized technical code or a calculated critical collapsing pressure of not less than 200 kpa (2 bar) gauge pressure. If the jacket is so closed as to be gas-tight (e.g. in the case of vacuum-insulation), a device shall be provided to prevent any dangerous pressure from developing in the insulating layer in the event of inadequate gas-tightness of the pressure receptacle or its fittings. The device shall prevent moisture from penetrating into the insulation Closed cryogenic receptacles intended for the carriage of refrigerated liquefied gases having a boiling point below -182 C at atmospheric pressure shall not include materials which may react with oxygen or oxygen enriched atmospheres in a dangerous manner, when located in parts of the thermal insulation where there is a risk of contact with oxygen or with oxygen enriched liquid Closed cryogenic receptacles shall be designed and constructed with suitable lifting and securing arrangements Materials of pressure receptacles The materials of which the pressure receptacles and their closures are made as well as all substances that might come into contact with the contents shall not be liable to be attacked by the contents or form harmful or dangerous compounds therewith. The following materials may be used: (a) carbon steel for compressed, liquefied, refrigerated liquefied gases and dissolved gases as well as for substances not in Class 2 listed in Table 3 of packing instruction P200 in ; (b) alloy steel (special steels), nickel, nickel alloy (such as monel) for compressed, liquefied, refrigerated liquefied gases and dissolved gases as well as for substances not in Class 2 listed in Table 3 of packing instruction P200 in ; (c) copper for: (i) gases of classification codes 1A, 1O, 1F and 1TF, whose filling pressure referred to a temperature of 15 C does not exceed 2 MPa (20 bar); (ii) gases of classification code 2A and also UN No dimethyl ether; UN No.1037 ethyl chloride; UN No.1063 methyl chloride; UN No.1079 sulphur dioxide; UN No.1085 vinyl bromide; UN No vinyl chloride; and UN No ethylene oxide and carbon dioxide mixture with more than 87% ethylene oxide; (iii) gases of classification codes 3A, 3O and 3F; (d) aluminium alloy: see special requirement "a" of packing instruction P200 (10) in ; (e) composite material for compressed, liquefied, refrigerated liquefied gases and dissolved gases; (f) synthetic materials for refrigerated liquefied gases; and (g) glass for the refrigerated liquefied gases of classification code 3A other than UN No.2187 carbon dioxide, refrigerated, liquid or mixtures thereof, and gases of classification code 3O Service equipment Openings Pressure drums may be provided with openings for filling and discharge and with other openings intended for level gauges, pressure gauges or relief devices. The number of openings shall be kept to a minimum consistent with safe operations. Pressure drums may also be provided with an inspection opening, which shall be closed by an effective closure

3 Fittings (a) If cylinders are fitted with a device to prevent rolling, this device shall not be integral with the valve cap; (b) Pressure drums which are capable of being rolled shall be equipped with rolling hoops or be otherwise protected against damage due to rolling (e.g. by corrosion resistant metal sprayed on to the pressure receptacle surface); (c) Pressure drums and cryogenic receptacles, which are not capable of being rolled, shall be fitted with devices (skids, rings, straps,) ensuring that they can be safely handled by mechanical means and so arranged as not to impair the strength of, nor cause undue stresses in, the wall of the pressure receptacle; (d) Bundles of cylinders shall be fitted with appropriate devices ensuring that they can be handled and carried safely. The manifold shall have at least the same test pressure as the cylinders. The manifold and the master cock shall be situated so as to be protected against any damage; (e) If level gauges, pressure gauges or relief devices are installed, they shall be protected in the same way as is required for valves in ; (f) Pressure receptacles whose filling is measured by volume shall be provided with a level indicator Additional requirements for closed cryogenic receptacles Each filling and discharge opening in a closed cryogenic receptacle used for the carriage of flammable refrigerated liquefied gases shall be fitted with at least two mutually independent shut-off devices in series, the first being a stop-valve, the second being a cap or equivalent device For sections of piping which can be closed at both ends and where liquid product can be trapped, a method of automatic pressure-relief shall be provided to prevent excess pressure build-up within the piping Each connection on a closed cryogenic receptacle shall be clearly marked to indicate its function (e.g. vapour or liquid phase) Pressure-relief devices Cryogenic receptacles, closed, shall be fitted with one or more pressure relief devices to protect the vessel against excess pressure. Excess pressure means a pressure in excess of 110% of the maximum working pressure due to normal heat leak or in excess of the test pressure due to the loss of vacuum for vacuum insulated pressure receptacles or due to the failure in the open position of a pressure build up system Closed cryogenic receptacles may, in addition, have a frangible disc in parallel with the spring-loaded device(s) in order to meet the requirements of Connections to pressure-relief devices shall be of sufficient size to enable the required discharge to pass unrestricted to the pressure-relief device All pressure-relief device inlets shall under maximum filling conditions be situated in the vapour space of the closed cryogenic receptacle and the devices shall be so arranged as to ensure that the escaping vapour is discharged unrestrictedly Capacity and setting of pressure-relief devices NOTE: In relation to pressure-relief devices of closed cryogenic receptacles, maximum allowable working pressure (MAWP) means the maximum effective gauge pressure permissible at the top of a loaded closed cryogenic receptacle in its operating position including the highest effective pressure during filling and discharge The pressure-relief device shall open automatically at a pressure not less than the MAWP and be fully open at a pressure equal to 110% of the MAWP. It shall, after discharge, close at a pressure not lower than 10% below the pressure at which discharge starts and shall remain closed at all lower pressures Frangible discs shall be set to rupture at a nominal pressure which is the lower of either the test pressure or 150% of the MAWP In the case of the loss of vacuum in a vacuum-insulated closed cryogenic receptacle, the combined capacity of all pressure-relief devices installed shall be sufficient so that the pressure (including accumulation) inside the closed cryogenic receptacle does not exceed 120% of the MAWP

4 The required capacity of the pressure-relief devices shall be calculated in accordance with a wellestablished technical code recognized by the competent authority Approval of pressure receptacles The conformity of pressure receptacles, having a test pressure capacity product of more than 150 MPa litre (1 500 bar litre) with the provisions of Class 2, shall be assessed by one of the following methods: (a) Single pressure receptacles shall be examined, tested and approved by a testing and certifying body approved by the competent authority of the country of approval 2, on the basis of the technical documentation and declaration of the manufacturer on compliance with the relevant provisions of Class 2. The technical documentation shall include full specifications on design and construction, and full documentation on the manufacturing and testing; or (b) The construction of the pressure receptacles shall be tested and approved by a testing and certifying body approved by the competent authority of the country of approval 2 on the basis of the technical documentation with regard to their compliance with the relevant provisions of Class 2. Pressure receptacles shall furthermore be designed, manufactured and tested according to a comprehensive quality assurance programme for design, manufacture, final inspection and testing. The quality assurance programme shall guarantee the conformity of the pressure receptacles with the relevant provisions of Class 2 and shall be approved and supervised by a testing and certifying body approved by the competent authority of the country of approval 2 ; or (c) The design type of the pressure receptacles shall be approved by a testing and certifying body approved by the competent authority of the country of approval 2. Any pressure receptacle of this design shall be manufactured and tested according to a quality assurance programme for production, final inspection and testing, which shall be approved and supervised by a testing and certifying body approved by the competent authority of the country of approval 2 ; or (d) The design type of the pressure receptacles shall be approved by a testing and certifying body approved by the competent authority of the country of approval 2. Any receptacle of this design shall be tested under the supervision of a testing and certifying body approved by the competent authority of the country of approval 2 on the basis of a declaration of the manufacturer on compliance with the approved design and the relevant provisions of Class The conformity of pressure receptacles having a test pressure capacity product of more than 30 MPa litre (300 bar litre) and not more than 150 MPa litre (1 500 bar litre) with the provisions of Class 2 shall be assessed by one of the methods described in or by one of the following methods: (a) The pressure receptacles shall be designed, manufactured and tested according to a comprehensive quality assurance programme for their design, manufacture, final inspection and testing, approved and supervised by a testing and certifying body approved by the competent authority of the country of approval 2 ; or (b) The design type of the pressure receptacle shall be approved by a testing and certifying body approved by the competent authority of the country of approval 2. The compliance of any pressure receptacle with the approved design shall be declared in writing by the manufacturer on the basis of his quality assurance programme for final inspection and testing of pressure receptacles, approved and supervised by a testing and certifying body approved by the competent authority of the country of approval 2 ; or (c) The design type of the pressure receptacle shall be approved by a testing and certifying body approved by the competent authority of the country of approval 2. The compliance of any pressure receptacle with the approved design shall be declared in writing by the manufacturer and all pressure receptacles of this type shall be tested under the supervision of a testing and certifying body approved by the competent authority of the country of approval 2 ; The conformity of pressure receptacles, having a test pressure capacity product of not more than 30 MPa litre (300 bar litre) with the provisions for Class 2 shall be assessed by one of the methods described in or or by one of the following methods: (a) The compliance of any pressure receptacle with a design, fully specified in technical documentation, shall be declared in writing by the manufacturer and pressure receptacles of this design shall be tested under the supervision of a testing and certifying body approved by the competent authority of the country of approval 2 ; or 1 See for example CGA Publications S "Pressure Relief Device Standards Part 2 Cargo and Portable Tanks for Compressed Gases" and S "Pressure Relief Device Standards Part 1 Cylinders for Compressed Gases". 2 If the country of approval is not a COTIF Member State or a contracting party to ADR, the competent authority of a COTIF Member State or a contracting party to ADR

5 (b) The design type of the pressure receptacles shall be approved by a testing and certifying body approved by the competent authority of the country of approval 2. The compliance of all pressure receptacles with the approved design shall be declared in writing by the manufacturer and all pressure receptacles of this type shall be tested individually The requirements of to shall be deemed to be complied with: (a) as regards the quality assurance systems mentioned in and , if they conform to the relevant European Standard of the EN ISO 9000 series; (b) in their entirety, if the relevant conformity assessment procedures of Council Directive 99/36/EC 3 have been complied with as follows: (i) for the pressure receptacles listed under , the modules G, or H1, or B in combination with D, or B in combination with F; (ii) for the pressure receptacles listed under , the modules H, or B in combination with E, or B in combination C1, or B1 in combination with F, or B1 in combination with D; (iii) for the pressure receptacles listed under , the modules A1, or D1, or E Requirements for manufacturers The manufacturer shall be technically competent and shall possess all suitable means required for the satisfactory manufacture of pressure receptacles; this relates in particular to qualified personnel: (a) to supervise the entire manufacturing process; (b) to carry out joining of materials; (c) to carry out the relevant tests. The proficiency test of a manufacturer shall in all instances be carried out by a testing and certifying body approved by the competent authority of the country of approval 2. The particular certification process the manufacturer intends to apply shall be taken into consideration Requirements for testing and certifying bodies Testing and certifying bodies shall be independent from manufacturing enterprises and technologically competent to the degree required. These requirements shall be deemed to be met if the bodies have been approved on the basis of an accreditation procedure in accordance with the relevant European standards of series EN Initial inspection and test New pressure receptacles, other than closed cryogenic receptacles, shall be subjected to testing and inspection during and after manufacture in accordance with the following: On an adequate sample of pressure receptacles: (a) Testing of the mechanical characteristics of the material of construction; (b) Verification of the minimum wall thickness; (c) Verification of the homogeneity of the material for each manufacturing batch; (d) Inspection of the external and internal conditions of the pressure receptacles; (e) Inspection of the neck threads; (f) Verification of the conformance with the design standard; For all pressure receptacles: (g) A hydraulic pressure test. Pressure receptacles shall withstand the test pressure without undergoing permanent deformation or exhibiting cracks; NOTE: With the agreement of the competent authority, the hydraulic pressure test may be replaced by a test using a gas, where such an operation does not entail any danger. (h) Inspection and assessment of manufacturing defects and either repairing them or rendering the pressure receptacles unserviceable. In the case of welded pressure receptacles, particular attention shall be paid to the quality of the welds; (i) An inspection of the markings on the pressure receptacles; (j) In addition, pressure receptacles intended for the carriage of UN No acetylene, dissolved, and UN No acetylene, solvent free, shall be inspected to ensure proper installation and condition of the porous material and, if applicable, the quantity of solvent. 3 Council Directive 99/36/EC concerning transportable pressure equipment (Official Journal of the European Communities, No. L 138 of )

6 On an adequate sample of closed cryogenic receptacles, the inspections and tests specified in (a), (b), (d), and (f) shall be performed. In addition, welds shall be inspected by radiographic, ultrasonic or another suitable non-destructive test method on a sample of closed cryogenic receptacles according to the applicable design and construction standard. This weld inspection does not apply to the jacket. Additionally, all closed cryogenic receptacles shall undergo the initial inspections and tests specified in (g), (h), and (i), as well as a leakproofness test and a test of the satisfactory operation of the service equipment after assembly Specific provisions applying to aluminium alloy pressure receptacles (a) In addition to the initial inspection required by , it is necessary to test for possible intercrystalline corrosion of the inside wall of the pressure receptacles where use is made of an aluminium alloy containing copper, or where use is made of an aluminium alloy containing magnesium and manganese and the manganese content is greater than 3.5% or the manganese content lower than 0.5%. (b) In the case of an aluminium/copper alloy the test shall be carried out by the manufacturer at the time of approval of a new alloy by the competent authority; it shall thereafter be repeated in the course of production, for each pour of the alloy. (c) In the case of an aluminium/magnesium alloy the test shall be carried out by the manufacturer at the time of approval of a new alloy and of the manufacturing process by the competent authority. The test shall be repeated whenever a change is made in the composition of the alloy or in the manufacturing process Periodic inspection and test Refillable pressure receptacles shall be subjected to periodic inspections by a body approved by the competent authority of the country of approval 2, in accordance with the periodicities defined in the relevant packing instruction P200 or P203 in and in accordance with the following specifications: (a) External examination of the pressure receptacle, equipment and markings; (b) Internal examination of the pressure receptacle (e.g. examination of the internal condition, verification of minimum wall thickness); (c) Checking of the threads if there is evidence of corrosion or if the fittings are removed; (d) The hydraulic pressure test and, if necessary, inspection of the characteristics of the material by suitable tests. NOTE 1: With the agreement of the testing and certifying body approved by the competent authority of the country of approval 2, the hydraulic pressure test may be replaced by a test using a gas, where such operation does not entail any danger, or by an equivalent method based on ultrasound. 2: With the agreement of the testing and certifying body approved by the competent authority of the country of approval 2, the hydraulic pressure test of cylinders or tubes may be replaced by an equivalent method based on acoustic emission testing, ultrasonic examination or a combination of acoustic emission testing and ultrasonic examination. 3: With the agreement of the testing and certifying body approved by the competent authority of the country of approval 2, the hydraulic pressure test of each welded steel cylinder intended for the carriage of gases of UN No.1965, hydrocarbon gas mixture liquefied, n.o.s., with a capacity below 6,5 l may be replaced by another test ensuring an equivalent level of safety For pressure receptacles intended for the carriage of UN No acetylene, dissolved, and UN No acetylene, solvent free, only the external condition (corrosion, deformation) and the condition of the porous material (loosening, settlement) shall be required to be examined By derogation from (d) closed cryogenic receptacles shall be inspected to verify external conditions, condition and operation of pressure relief devices and subjected to a leakproofness test. The leakproofness test shall be carried out with the gas contained in the pressure receptacle or with an inert gas. Checking shall be performed by means of a pressure gauge or by vacuum measurement. The thermal insulation need not be removed Marking of refillable pressure receptacles Refillable pressure receptacles shall be marked clearly and legibly with certification, operational and manufacturing marks. These marks shall be permanently affixed (e.g. stamped, engraved, or etched) on the pressure receptacle. The marks shall be on the shoulder, top end or neck of the pressure receptacle or on a permanently affixed component of the pressure receptacle (e.g. welded collar or corrosion resistant plate welded on the outer jacket of a closed cryogenic receptacle). The minimum size of the marks shall be 5 mm for pressure receptacles with a diameter greater than or equal to 140 mm and 2.5 mm for pressure receptacles with a diameter less than 140 mm

7 The following certification marks shall be applied: (a) The technical standard used for design, construction and testing, as listed in the table under or the approval number; (b) The character(s) identifying the country of approval as indicated by the distinguishing signs of motor vehicles in international traffic; (c) The identity mark or stamp of the inspection body that is registered with the competent authority of the country authorizing the marking; (d) The date of the initial inspection, the year (four digits) followed by the month (two digits) separated by a slash (i.e. "/" ) The following operational marks shall be applied: (e) The test pressure in bar, preceded by the letters "PH" and followed by the letters "BAR"; (f) The mass of the empty pressure receptacle including all permanently attached integral parts (e.g. neck ring, foot ring, etc.) in kilograms, followed by the letters "KG". This mass shall not include the mass of valve, valve cap or valve guard, any coating, or porous material for acetylene. The mass shall be expressed to three significant figures rounded up to the last digit. For cylinders of less than 1 kg, the mass shall be expressed to two significant figures rounded up to the last digit. In the case of pressure receptacles for UN 1001 acetylene, dissolved and UN 3374 acetylene, solvent free, at least one decimal shall be shown after the decimal point and two digits for pressure receptacles of less than 1 kg. This mark is not required for pressure receptacles for UN No hydrocarbon gas mixture, liquefied, n.o.s.; (g) The minimum guaranteed wall thickness of the pressure receptacle in millimetres followed by the letters "MM". This mark is not required for pressure receptacles of UN No hydrocarbon gas mixture, liquefied, n.o.s., nor for pressure receptacles with a water capacity less than or equal to 1 l or for composite cylinders or for closed cryogenic receptacles; (h) In the case of pressure receptacles for compressed gases, UN No acetylene, dissolved, and UN No acetylene, solvent free, the working pressure in bar, preceded by the letters "PW". In the case of closed cryogenic receptacles, the maximum allowable working pressure preceded by the letters "MAWP"; (i) The water capacity of the receptacle in litres followed by the letter "L". In the case of pressure receptacles for liquefied gases the water capacity in litres shall be expressed to three significant figures rounded down to the last digit. If the value of the minimum or nominal water capacity is an integer, the digits after the decimal point may be neglected; (j) In the case of pressure receptacles for UN No acetylene, dissolved, the total of the mass of the empty receptacle, the fittings and accessories not removed during filling, any coating, the porous material, the solvent and the saturation gas expressed to three significant figures rounded down to the last digit followed by the letters "KG". At least one decimal shall be shown after the decimal point. For pressure receptacles of less than 1 kg, the mass shall be expressed to two significant figures rounded down to the last digit; (k) In the case of pressure receptacles for UN No acetylene, solvent free, the total of the mass of the empty receptacle, the fittings and accessories not removed during filling, any coating and the porous material expressed to three significant figures rounded down to the last digit followed by the letters "KG". At least one decimal shall be shown after the decimal point. For pressure receptacles of less than 1 kg, the mass shall be expressed to two significant figures rounded down to the last digit The following manufacturing marks shall be applied: (l) Identification of the cylinder thread (e.g. 25E). This mark is not required for pressure receptacles of UN No hydrocarbon gas mixture, liquefied, n.o.s. and for closed cryogenic receptacles; (m) The manufacturer's mark registered by the competent authority. When the country of manufacture is not the same as the country of approval, then the manufacturer's mark shall be preceded by the character(s) identifying the country of manufacture as indicated by the distinguishing signs of motor vehicles in international traffic. The country mark and the manufacturer's mark shall be separated by a space or slash; (n) The serial number assigned by the manufacturer; (o) In the case of steel pressure receptacles and composite pressure receptacles with steel liner intended for the carriage of gases with a risk of hydrogen embrittlement, the letter "H" showing compatibility of the steel (see ISO :1997) The above marks shall be placed in three groups. Manufacturing marks shall be the top grouping and shall appear consecutively in the sequence given in The operational marks in shall be the middle grouping and the test pressure (e) shall be immediately preceded by the working pressure (h) when the latter is required. Certification marks shall be the bottom grouping and shall appear in the sequence given in

8 Other marks are allowed in areas other than the side wall, provided they are made in low stress areas and are not of a size and depth that will create harmful stress concentrations. In the case of closed cryogenic receptacles, such marks may be on a separate plate attached to the outer jacket. Such marks shall not conflict with required marks In addition to the preceding marks, each refillable pressure receptacle that meets the periodic inspection and test requirements of shall be marked indicating: (a) The character(s) identifying the country authorizing the body performing the periodic inspection and test. This marking is not required if this body is approved by the competent authority of the country approving manufacture; (b) The registered mark of the body authorized by the competent authority for performing periodic inspection and test; (c) The date of the periodic inspection and test, the year (two digits) followed by the month (two digits) separated by a slash (i.e. "/" ). Four digits may be used to indicate the year. The above marks shall appear consecutively in the sequence given. NOTE: The month need not be indicated for gases for which the interval between periodic inspections is ten years or more (see packing instructions P200 and P203) With the agreement of the competent authority, the date of the most recent periodic inspection and the stamp of the expert may be engraved on a ring of an appropriate material affixed to the cylinder when the valve is installed and which is removable only by disconnecting the valve from the cylinder Marking of non-refillable pressure receptacles Non-refillable pressure receptacles shall be marked clearly and legibly with certification and gas or pressure receptacle specific marks. These marks shall be permanently affixed (e.g. stencilled, stamped, engraved, or etched) on the pressure receptacle. Except when stencilled, the marks shall be on the shoulder, top end or neck of the pressure receptacle or on a permanently affixed component of the pressure receptacle (e.g. welded collar). Except for the "DO NOT REFILL" mark, the minimum size of the marks shall be 5mm for pressure receptacles with a diameter greater than or equal to 140 mm and 2.5 mm for pressure receptacles with a diameter less than 140 mm. The minimum size of the "DO NOT REFILL" mark shall be 5 mm The marks listed in to shall be applied with the exception of (f), (g), and (l). The serial number (n) may be replaced by the batch number. In addition, the words "DO NOT REFILL" in letters of at least 5 mm in height are required The requirements of shall apply. NOTE: Non-refillable pressure receptacles may, on account of their size, substitute this marking by a label Other marks are allowed provided they are made in low stress areas other than the side wall and are not of a size and depth that will create harmful stress concentrations. Such marks shall not conflict with required marks Pressure receptacles designed, constructed and tested according to standards The requirements of are considered to have been complied with if the following standards, as relevant, are applied: NOTE: Persons or bodies identified in standards as having responsibilities in accordance with RID shall meet the requirements of RID. Reference Title of document Applicable subsections and paragraphs for materials EN 1797:2001 Cryogenic vessels Gas/material compatibility EN ISO :1997 EN ISO :2000 Transportable gas cylinders Compatibility of cylinder and valve materials with gas contents-part 1: Metallic materials Transportable gas cylinders Compatibility of cylinder and valve materials with gas contents Part 2: Nonmetallic materials

9 Reference Title of document Applicable subsections and paragraphs EN ISO :2005 (except method C in 5.3) Transportable gas cylinders Compatibility of cylinder and valve materials with gas contents Part 4: Test methods for selecting metallic materials resistant to hydrogen embrittlement for design and construction Annex I, Parts 1 to 3 to 84/525/EEC Annex I, Parts 1 to 3 to 84/526/EEC Annex I, Parts 1 to 3 to 84/527/EEC EN 1442:1998/ A2:2005 EN 1800:1998 / AC:1999 EN :1999 EN 1975: A1:2003 EN ISO 11120:1999 EN :2000 EN 12862:2000 EN :2000 EN 12257:2002 Council Directive of 17 September 1984 on the approximation of the laws of the Member States relating to seamless steel gas cylinders, published in the Official Journal of the European Communities, No. L 300, 19 November Council Directive of 17 September 1984 on the approximation of the laws of the Member States relating to seamless, unalloyed aluminium and aluminium alloy gas cylinders, published in the Official Journal of the European Communities, No. L 300, 19 November Council Directive of 17 September 1984 on the approximation of the laws of the Member States relating to welded unalloyed steel gas cylinders, published in the Official Journal of the European Communities, No. L 300, 19 November Transportable refillable welded steel cylinders for liquefied petroleum gas (LPG) Design and construction Transportable gas cylinders Acetylene cylinders Basic requirements and definitions Transportable gas cylinders Specifications for the design and construction of refillable transportable seamless steel gas cylinders of capacity from 0.5 litres up to 150 litres Part 1: Cylinders made of seamless steel with a Rm value of less than MPa Transportable gas cylinders Specifications for the design and construction of refillable transportable seamless aluminium and aluminium alloy gas cylinders of capacity from 0.5 litres up to 150 litres Gas cylinders Refillable seamless steel tubes for compressed gas transport of water capacity between 150 litres and litres Design, construction and testing Transportable gas cylinders Specifications for the design and construction of refillable transportable seamless steel gas cylinders of capacity from 0.5 litre up to 150 litres Part 3: Cylinders made of stainless steel with an R m value less than 1100 MPa Transportable gas cylinders Specifications for the design and construction of refillable transportable welded aluminium alloy gas cylinders Cryogenic vessels Transportable, vacuum insulated, of not more than litres volume Part 2: Design, fabrication, inspection and testing Transportable gas cylinders Seamless, hoop wrapped composite cylinders and and and and and and and and and and and

10 Reference Title of document Applicable subsections and paragraphs EN 12807:2001 (except Annex A) EN :2001 EN 13293:2002 EN : A1:2006 EN :2003 EN 12245:2002 EN 12205:2001 EN 13110:2002 Transportable refillable brazed steel cylinders for liquefied petroleum gas (LPG) Design and construction Transportable gas cylinders Specification for the design and construction of refillable transportable seamless steel gas cylinders of water capacities from 0.5 litre up to and including 150 litre Part 2: Cylinders made of seamless steel with an Rm 1100 MPa Transportable gas cylinders Specification for the design and construction of refillable transportable seamless normalised carbon manganese steel gas cylinders of water capacity up to 0.5 litre for compressed, liquefied and dissolved gases and up to 1 litre for carbon dioxide Transportable gas cylinders Refillable welded steel gas cylinders Design and construction Part 1: Welded steel Transportable gas cylinders Refillable welded stainless steel gas cylinders Design and construction Part 2: Welded stainless steel Transportable gas cylinders Fully wrapped composite cylinders Transportable gas cylinders Non refillable metallic gas cylinders Transportable refillable welded aluminium cylinders for liquefied petroleum gas (LPG) Design and construction and and and and and and , and , and EN 14427: A1:2005 Transportable refillable fully wrapped composite cylinders for liquefied petroleum gases Design and construction NOTE 1: This standard applies only to cylinders equipped with pressure relief valves. 2: In and , both cylinders shall be subject to a burst test when they show damage equal to or worse than the rejection criteria , and EN 14208:2004 EN 14140:2003 EN 13769:2003/ A1:2005 for closures EN ISO 10297:2006 Transportable gas cylinders Specification for welded pressure drums up to 1000 litre capacity for the transport of gases Design and construction Transportable refillable welded steel cylinders for Liquefied Petroleum Gas (LPG) Alternative design and construction Transportable gas cylinders Cylinder bundles Design, manufacture, identification and testing Transportable gas cylinders Cylinder valves: Specification and type testing , and , and , and EN 13152:2001 Specifications and testing of LPG cylinder valves Self closing

11 Reference Title of document Applicable subsections and paragraphs EN 13153:2001 Specifications and testing of LPG cylinder valves Manually operated for periodic inspection and test EN :2000 EN 1968: A1:2005 (except Annex B) EN 1802:2002 (except Annex B) EN 12863: A1:2005 EN 1803:2002 (except Annex B) EN ISO 11623:2002 (except clause 4) EN 14189:2003 Cryogenic vessels Transportable, vacuum insulated, of not more than litres volume Part 3: Operational requirements Transportable gas cylinders Periodic inspection and testing of seamless steel gas cylinders Transportable gas cylinders Periodic inspection and testing of seamless aluminium alloy gas cylinders Transportable gas cylinders Periodic inspection and maintenance of dissolved acetylene cylinders NOTE: In this standard "initial inspection" is to be understood as the "first periodic inspection" after final approval of a new acetylene cylinder. Transportable gas cylinders Periodic inspection and testing of welded steel gas cylinders Transportable gas cylinders Periodic inspection and testing of composite gas cylinders Transportable gas cylinders Inspection and maintenance of cylinder valves at time of periodic inspection of gas cylinders Requirements for pressure receptacles not designed, constructed and tested according to standards Pressure receptacles not designed, constructed and tested according to standards listed in the tables of or shall be designed, constructed and tested in accordance with the provisions of a technical code providing the same level of safety and recognised by the competent authority. Where an appropriate standard is referenced in the tables of or the competent authority shall, within two years, withdraw recognition for the use of any technical code for the same purpose. This does not remove the competent authority s rights to recognise technical codes to reflect scientific and technical progress or where no standard exists or to deal with specific aspects not addressed in a standard. The competent authority shall transmit to the secretariat of OTIF a list of the technical codes that it recognises. The list should include the following details: name and date of the code, purpose of the code and details of where it may be obtained. The secretariat shall make this information publicly available on its website. The requirements of and the following requirements however shall be met: Metal cylinders, tubes, pressure drums and bundles of cylinders At the test pressure, the stress in the metal at the most severely stressed point of the pressure receptacle shall not exceed 77% of the guaranteed minimum yield stress (Re). "Yield stress" means the stress at which a permanent elongation of 2 per thousand (i.e. 0.2%) or, for austenitic steels, 1% of the gauge length on the test-piece, has been produced. NOTE: In the case of sheet-metal the axis of the tensile test-piece shall be at right angles to the direction of rolling. The permanent elongation at fracture, shall be measured on a test-piece of circular cross-section in which the gauge length "l" is equal to five times the diameter "d" (l = 5d); if test pieces of rectangular cross-section are used, the gauge length "l" shall be calculated by the formula: l = 5,65 F

12 where F 0 indicates the initial cross-sectional area of the test-piece. Pressure receptacles and their closures shall be made of suitable materials which shall be resistant to brittle fracture and to stress corrosion cracking between 20 C and +50 C. Welds shall be skilfully made and shall afford the fullest safety Additional provisions relating to aluminium-alloy pressure receptacles for compressed gases, liquefied gases, dissolved gases and non pressurized gases subject to special requirements (gas samples) as well as articles containing gas under pressure other than aerosol dispensers and small receptacles containing gas (gas cartridges) The materials of aluminium-alloy pressure receptacles which are to be accepted shall satisfy the following requirements: A B C D Tensile strength, Rm, in MPa (=N/mm 2 ) Yield stress, Re, in Mpa (=N/mm 2 ) (permanent set λ = 0.2 %) Permanent elongation at fracture (l = 5d) in per cent Bend test (diameter of former d = n e, where e is the thickness of the test piece) n = 5 (Rm 98) n = 6 (Rm > 98) n = 6 (Rm 325) n = 7 (Rm > 325) n = 6 (Rm 325) n = 7 (Rm > 325) n = 7 (Rm 392) n = 8 (Rm > 392) Aluminium Association Series Number (a) (a) See "Aluminium Standards and Data", Fifth edition, January 1976, published by the Aluminium Association, 750 Third Avenue, New York. The actual properties will depend on the composition of the alloy concerned and on the final treatment of the pressure receptacle, but whatever alloy is used the thickness of the pressure receptacle shall be calculated by one of the following formulae: e = PMPa x D 2 x Re + PMPa 1.30 or e = Pbar x D 20 x Re + Pbar 1.30 where e = minimum thickness of pressure receptacle wall, in mm; P MPa = test pressure, in MPa P bar = test pressure, in bar D = nominal external diameter of the pressure receptacle, in mm; and Re = guaranteed minimum proof stress with 0.2% proof stress, in MPa (=N/mm 2 ) In addition, the value of the minimum guaranteed proof stress (Re) introduced into the formula is in no case to be greater than 0.85 times the guaranteed minimum tensile strength (Rm), whatever the type of alloy used. NOTE 1: The above characteristics are based on previous experience with the following materials used for pressure receptacles: Column A: Aluminium, unalloyed, 99.5 g pure; Column B: Alloys of aluminium and magnesium; Column C: Alloys of aluminium, silicon and magnesium, such as ISO/R209-Al-Si-Mg (Aluminium Association 6351); Column D: Alloys of aluminium, copper and magnesium; 2: The permanent elongation at fracture is measured by means of test-pieces of circular crosssection in which the gauge length "l" is equal to five times the diameter "d" (l= 5d); if test-pieces of rectangular section are used the gauge length shall be calculated by the formula: l = 5.65 F 0 where F o is the initial cross-section area of the test-piece

13 3: (a) The bend test (see diagram) shall be carried out on specimens obtained by cutting into two equal parts of width 3e, but in no case less than 25 mm, an annular section of a cylinder. The specimens shall not be machined elsewhere than on the edges. (b) The bend test shall be carried out between a mandrel of diameter (d) and two circular supports separated by a distance of (d + 3e). During the test the inner faces shall be separated by a distance not greater than the diameter of the mandrel. (c) The specimen shall not exhibit cracks when it has been bent inwards around the mandrel until the inner faces are separated by a distance not greater than the diameter of the mandrel. (d) The ratio (n) between the diameter of the mandrel and the thickness of the specimen shall conform to the values given in the table. d e d+ 3 e approx. Diagram of bend test A lower minimum elongation value is acceptable on condition that an additional test approved by the competent authority of the country in which the pressure receptacles are made proves that safety of carriage is ensured to the same extent as in the case of pressure receptacles constructed to comply with the characteristics given in the table in (see also EN 1975: A1:2003) The wall thickness of the pressure receptacles at the thinnest point shall be the following: where the diameter of the pressure receptacle is less than 50 mm: not less than 1.5 mm; where the diameter of the pressure receptacle is from 50 to 150 mm: not less than 2 mm; and where the diameter of the pressure receptacle is more than 150 mm: not less than 3 mm The ends of the pressure receptacles shall have a semicircular, elliptical or "basket-handle" section; they shall afford the same degree of safety as the body of the pressure receptacle Pressure receptacles in composite materials For composite cylinders, tubes, pressure drums and bundles of cylinders which make use of composite materials i.e. comprising a liner hoop wrapped or fully wrapped with reinforcement material, the construction shall be such that a minimum burst ratio (burst pressure divided by test pressure) is: 1.67 for hoop wrapped pressure receptacles; 2.00 for fully wrapped pressure receptacles Closed cryogenic receptacles The following requirements apply to the construction of closed cryogenic receptacles for refrigerated liquefied gases: If non-metallic materials are used, they shall resist brittle fracture at the lowest working temperature of the pressure receptacle and its fittings; Pressure receptacles shall be fitted with a safety valve which shall be capable of opening at the working pressure shown on the pressure receptacle. The valves shall be so constructed as to work perfectly even at their lowest working temperature. Their reliability of functioning at that temperature shall be established and checked by testing each valve or a sample of valves of the same type of construction; The vents and safety valves of pressure receptacles shall be so designed as to prevent the liquid from splashing out

14 6.2.4 General requirements for aerosol dispensers and small receptacles containing gas (gas cartridges) Design and construction Aerosol dispensers (UN No.1950 aerosols) containing only a gas or a mixture of gases, and small receptacles containing gas (gas cartridges) (UN No. 2037), shall be made of metal. This requirement shall not apply to aerosols and small receptacles containing gas (gas cartridges) with a maximum capacity of 100 ml for UN No butane. Other aerosol dispensers (UN No.1950 aerosols) shall be made of metal, synthetic material or glass. Receptacles made of metal and having an outside diameter of not less than 40 mm shall have a concave bottom The capacity of receptacles made of metal shall not exceed ml; that of receptacles made of synthetic material or of glass shall not exceed 500 ml Each model of receptacles (aerosol dispensers or cartridges) shall, before being put into service, satisfy a hydraulic pressure test carried out in conformity with The release valves and dispersal devices of aerosol dispensers (UN No.1950 aerosols) and the valves of UN No small receptacles containing gas (gas cartridges) shall ensure that the receptacles are so closed as to be leakproof and shall be protected against accidental opening. Valves and dispersal devices which close only by the action of the internal pressure are not to be accepted The internal pressure at 50 C shall exceed neither two-thirds of the test pressure nor 1.32 MPa (13.2 bar). Aerosol dispensers and small receptacles containing gas (gas cartridges) shall be so filled that at 50 C the liquid phase does not exceed 95% of their capacity Hydraulic pressure test The internal pressure to be applied (test pressure) shall be 1.5 times the internal pressure at 50 C, with a minimum pressure of 1 MPa (10 bar) The hydraulic pressure tests shall be carried out on at least five empty receptacles of each model: (a) until the prescribed test pressure is reached, by which time no leakage or visible permanent deformation shall have occurred; and (b) until leakage or bursting occurs; the dished end, if any, shall yield first and the receptacle shall not leak or burst until a pressure 1.2 times the test pressure has been reached or passed Tightness (leakproofness) test Small receptacles containing gas (gas cartridges) Each receptacle shall satisfy a tightness (leakproofness) test in a hot-water bath The temperature of the bath and the duration of the test shall be such that the internal pressure of each receptacle reaches at least 90% of the internal pressure that would be reached at 55 C. However, if the contents are sensitive to heat or if the receptacles are made of a plastics material which softens at this temperature, the temperature of the bath shall be from 20 C to 30 C. In addition, one receptacle out of every 2000 shall be tested at 55 C No leakage or permanent deformation of a receptacle shall occur, except that a plastics receptacle may be deformed through softening provided that it does not leak Aerosol dispensers Each filled aerosol dispenser shall be subjected to a test performed in a hot water bath or an approved water bath alternative Hot water bath test The temperature of the water bath and the duration of the test shall be such that the internal pressure reaches that which would be reached at 55 C (50 C if the liquid phase does not exceed 95% of the capacity of the aerosol dispenser at 50 C). If the contents are sensitive to heat or if the aerosol dispensers are made of plastics material which softens at this test temperature, the temperature of the bath shall be set at between 20 C and 30 C but, in addition, one aerosol dispenser in 2000 shall be tested at the higher temperature No leakage or permanent deformation of an aerosol dispenser may occur, except that a plastics aerosol dispenser may be deformed through softening provided that it does not leak